Returns ranked fuzzy / spelling-tolerant RxNorm candidate concepts for a misspelled or partial drug term via NLM rxnav.nlm.nih.gov/REST/approximateTerm, each with rxcui, score and source. Autonomous agents and agent-to-agent (A2A) intake, OCR-cleanup and voice-transcription pipelines use it to correct noisy drug names before coding. Ranking surface: noisy term to scored candidate list. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.
Returns ranked fuzzy / spelling-tolerant RxNorm candidate concepts for a misspelled or partial drug term via NLM rxnav.nlm.nih.gov/REST/approximateTerm, each with rxcui, score and source. Autonomous agents and agent-to-agent (A2A) intake, OCR-cleanup and voice-transcription pipelines use it to correct noisy drug names before coding. Ranking surface: noisy term to scored candidate list. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.